1) Make sure that the pressure relief valve is working- although this breakage is still possible with a properly functioning relief valve.

2) Make sure that the quadrant controls (lift controls) are adjusted properly. If they are not, the cylinder can bottom out and the valve will be in "constant pumping" as they refer to it on the newer models.

The pressure relief valve is just ahead of the side cover on the "dipstick" side of the transmission- if it is still full of oil you will have to drain 4-5 gallons out to see it. They aren't that expensive, and I would replace it if it were mine.

I do not know the steps for checking the adjustments of the quadrant controls off the top of my head, but if you own or have access to an I&T manual, they do a pretty good job. An MF service manual will go into a little more detail.

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